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Finding the Fourth Proportional to 485,870.40, 728,805.60 and 170,359.20

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Solution

The fourth proportional to 485,870.40, 728,805.60 and 170,359.20 is: 255,538.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,870.40 : 728,805.60 = 170,359.20 : x
  2. Step 2: Convert to fraction form
    485,870.40/728,805.60 = 170,359.20/x
  3. Step 3: Cross multiply
    485,870.40x = 728,805.60 × 170,359.20
  4. Step 4: Simplify right side
    485,870.40x = 124,158,738,971.52
  5. Step 5: Solve for x
    x = 124,158,738,971.52/485,870.40
  6. Step 6: Final answer
    x = 255,538.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.